Causal
strong strength
Narrative Connection
How these two moments in the story relate
From
Clara and Troi bond over Isabella
S5E22
·
Imaginary Friend
To
Alien energy breaches the Enterprise
S5E22
·
Imaginary Friend
Why These Connect
The narrative assertion
"The Enterprise approaches the nebula, and shortly after, a point of light enters the ship, initiating the events that lead to Isabella's physical presence."
About Causal Connections
A directly causes B. The first event sets forces in motion that produce the second. These are the load-bearing connections of plot--remove one and the story structure collapses.